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Finding the Fourth Proportional to 78,908.34, 108,895.89 and 43,100.28

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Solution

The fourth proportional to 78,908.34, 108,895.89 and 43,100.28 is: 59,479.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,908.34 : 108,895.89 = 43,100.28 : x
  2. Step 2: Convert to fraction form
    78,908.34/108,895.89 = 43,100.28/x
  3. Step 3: Cross multiply
    78,908.34x = 108,895.89 × 43,100.28
  4. Step 4: Simplify right side
    78,908.34x = 4,693,443,349.85
  5. Step 5: Solve for x
    x = 4,693,443,349.85/78,908.34
  6. Step 6: Final answer
    x = 59,479.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.